[Python] python script to open tera term application and sending keys

I am trying to use Python script to run Tera Term application to open console for Serial port communication and i am sending some commands/keys like {Enter} key on tera term . but my script dosen't work. Heres the script -

import os
import win32com.client
shell = win32com.client.Dispatch("WScript.Shell")
shell.Run("C:\\Program Files (x86)\\teraterm\\ttermpro.exe")
shell.AppActivate("COM1:57600baud - Tera Term VT")
shell.SendKeys("{Enter}")


i am using python2.7 on my windowxp Pc. please help me with this i am new to python . please help me out

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